Energy Investment (EROI) when procuring them. We assessed data from the United States Bureau of the Census of Mineral … Jean Laherrere to derive EROI for both finding and producing oil and gas. We found two general patterns in the relation of … energy gains compared to energy costs: a gradual secular decrease in EROI and an inverse relation to drilling effort. EROI …

increasing energy efficiency, which will led to an increase in the energy return on investment (EROI) of both oil and gas … production as a whole, and of separate companies in particular. By our calculations, the EROI for oil production in Russia … differs for the different companies, and in 2012 was in the range of 22–35:1. The EROI for light oil products in 2012 was in …

Energy Return on Investment (EROI) refers to how much energy is returned from one unit of energy invested in an energy …-producing activity. It is a critical parameter for understanding and ranking different fuels. There were a number of studies on EROI … three decades ago but relatively little work since. Now there is a whole new interest in EROI as fuels get increasingly …

For many reasons, including environmental impacts and the peaking and depletion of the highest grades of fossil energy … (EROI), the price of energy, and the profit of an energy business. Our analyses show that EROI and the price of energy are … inherently inversely related such that as EROI decreases for depleting fossil fuel production, the corresponding energy prices …

The main objective of this manuscript is to provide a formal methodology, structure, and nomenclature for EROI analysis … that is both consistent, so that all EROI numbers across various processes can be compared, and also flexible, so that … address four areas that are of particular interest within EROI analysis: (1) boundaries of the system under analysis, (2 …

Most estimates of energy-return-on-investment (EROI) are “static”. They determine the amount of energy produced by a … changes in EROI of a particular resource over time. Such approaches are “bottom-up”. This paper presents a conceptual … framework for a “top-down” dynamic function for the EROI of an energy resource. This function is constructed from fundamental …

society (EROI-S), a ratio of total energy delivered to total energy expended. Energy use records for technology and proxy …

Declining energy return on investment (EROI) of a society’s available energy sources can lead to both crisis and … opportunity for positive social change. The implications of declining EROI for human wellbeing are complex and open to … possible implications of declining EROI. Two sets of future scenarios based on environmental and economic trends are described …

production. Energy return on investment (EROI) can be useful for this because its methodology is based on outputs and inputs … China has to be derived from economic costs and revenues for oil fields. In this paper we derive a first EROI for China … largest oil field in China. We estimate that its EROI_stnd expressed as heat equivalent was 10:1 in 2001 but has …

The authors of this paper have been involved in contentious discussion of the EROI of biomass-based ethanol. This … contention has undermined, in the minds of some, the utility of EROI for assessing fuels. This paper seeks to understand the …